1. Department of Veterinary and Animal Sciences Faculty of Health and Medical Sciences University of Copenhagen Frederiksberg Denmark
2. Kopenhagen Diagnostics Department of Health and Diagnostics Kopenhagen Fur a.m.b.a Glostrup Denmark
3. National Food Institute Research Group for Microbiology and Hygiene Technical University of Denmark Kongens Lyngby Denmark
4. Department of Veterinary Clinical Sciences Faculty of Health and Medical Sciences University of Copenhagen Frederiksberg Denmark
5. National Food Institute Technical University of Denmark Kongens Lyngby Denmark
6. Royal Veterinary College University of London London UK
7. INTHERES Université de Toulouse INRA ENVT Toulouse France